in a mathematics class, there are 56 students. there are 14 more girls than boys. how many boys are there?
There are 21 boys in the class.
Step-by-step explanation
Let:
- bbb = number of boys
- ggg = number of girls
From the problem:
-
Total students:
b+g=56b+g=56b+g=56 -
There are 14 more girls than boys:
g=b+14g=b+14g=b+14
Substitute ggg into the first equation:
- b+(b+14)=56b+(b+14)=56b+(b+14)=56
- 2b+14=562b+14=562b+14=56
- 2b=56โ14=422b=56-14=422b=56โ14=42
- b=42รท2=21b=42\div 2=21b=42รท2=21
So:
- Boys = 21
- Girls = 21+14=3521+14=3521+14=35, and 21+35=5621+35=5621+35=56, which fits the total.
Answer: 21 boys.